Hermann thijrfelder



(No Model.)

H. THURFELDER. APPARATUS FOR FORMING ARTICLES OF AMBER, 6m.

No. 461,722. Patented 001;; 20, 1891.

law. Q ea I n u W/TNESSES: 1M [MEMO/i;

.ii ermalmfluljkldn WWW j By AJQZMJIXZQ r ATTORNEYS STATES ATENT OFFICE.

HERMANN THURFELDER, or HOBOKEN, NEW JERSEY, ASSIGNOR To WM. DEMUTH & 00., or NE YORK, N. Y.

APPARATUS FOR FORMING ARTICLES OF AMBER, 800.

SPECIFICATION forming part of Letters Patent No. 461,722, dated October 20, 1891.

Application filecl June 11, 1891.

To all whom it may concern.-

Be it known that I, HERMANN THiiRFELDER, a subject of the Emperor of Austria, residing at Hoboken, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in'Apparatus for Forming Articles of Amber and other Substances, of which the following is a specification.

This invention relates to an apparatus for forming or fusing various articles of amber or other substances by forcing the latter in a molten state into suitable molds.

The peculiar and novel construction of my apparatus is pointed outin the followingspecification and claims and illustrated in the accompanying drawings, in which Figure 1 is a vertical section of the apparatus along line :0 m, Fig. 2. Fig. 2 is a section along line y y, Fig. 1. Fig. 3 shows a bottom plate. Fig. 4shows another bottom plate. Fig. 5 is a detail View of the spout, sectioned along line 00' :12, Fig. 2. Fig. 6 is a section along line y y", Fig. 5. Fig. 7 shows a pair of slides in closing position. Fig. 8 shows a pair of slides in opening position.

In the drawings, the letterA indicates a crucible, in which the amber or other substances is heated to its melting-point. The bottom plate'B, Fig. 3, of the crucible has perforations, and this bottom plate rests on another bottom plate 0, Fig. 4, which is cut away at the perforations in plate B, so that the contents from crucible A can pass into the discharge-spout D. This spout Dis formed with a recess for receiving a mold E. The mold can be slipped or slid laterally into or out of the seat or recess in spout D.

The spout D can be closed by a pair of slides F F, so that when the mold is withdrawn the flow of material in the spout can be stopped. The slides F are perforated, and when the perforations of both slides coincide, Fig. 8, the material can pass from spout D into the mold. If the slides are moved so as to interrupt the communication between the perforations, Fig. '7, the spout is closed. The mold E has similar slides G G, and when the mold is filled the slides G are moved so Serial No. 395,938. (No model.)

as to close the mold, whereupon the latter can be withdrawn from its seat in spout'D and placed aside until the contents have become sufficiently hard for removal. While the contents of the first mold are hardening, a second mold can be slipped into the spout and filled, so that the work can progress rapidly.

A plunger I-I, fitting the crucible A, can be made to force the substance along spout D and into mold E with sufficient force to secure the proper density of the molded substance. The crucible is surrounded by a shell or jacket I, formed of two'p'arts, having flanges K riveted or fastened together, and this shell can form a steam or other bath to keep the. contents of the crucible at the right temperature.

'The mold shown in the drawings is formed to shape tips for cigar-holders or pipes; but, of course, any style of mold can be usedas, for example, for forming ornaments, jewelry, charms, or any other article.

The force with which the plunger H is depressed can be varied to suit circumstances. In molding such substance as amber I have found a force-of about two hundred tons exerted on the plunger to give satisfactory results.

The advantage ofthe perforations in the bottom plate B is that the perforations-allow only the thoroughly fused or melted parts to pass into spout D, and the perforations in plates F and G allow only the thoroughly fused parts to pass into the mold. By its passage through the perforations the substance also has its particles thoroughly mixed, so that the substance becomes homogeneous.

What I claim as new, and desire to secure by Letters Patent, is

1. A crucible provided with a dischargespout formed with a recess for receiving the mold, substantially as described.

2. The combination, with the crucible and its spout having a mold-receiving recess, of two slides for closing said spout, substantially as described.

3. A crucible having a bottom composed of two stationary interior plates B 0, one pro- In testimony whereof I have hereunto set vided with perforations and the other out my hand in the presence of two subscribing away below the perforations, and a lateral Witnesses.

dischargespont D, communicating with the ITERMANN TI-IURFELDER. 5 interior of the crucible at a point below the \Vitnesses:

perforated bottom plate, substantially as de- XVM. C. IIAUFF,

scribed. E. F. KASTENHUBER. 

